Number of ways to partition a labeled set into 2-colored subsets of equal size.
A038043
Number of ways to partition a labeled set into 2-colored subsets of equal size.
Terms
- a(0) =2a(1) =4a(2) =4a(3) =10a(4) =4a(5) =54a(6) =4a(7) =284a(8) =564a(9) =2146a(10) =4a(11) =64068a(12) =4a(13) =273706a(14) =3055056a(15) =9322174a(16) =4a(17) =455865986a(18) =4a(19) =7379708912a(20) =72557376324a(21) =27499326586a(22) =4a(28) =4
External references
- oeis: A038043